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Efficient transport of tdm services over packet networks

a packet network and packet technology, applied in the field of communication networks, can solve the problems of consuming network bandwidth without carrying any useful information, consuming network bandwidth, and 2/b> media access control (mac) header that brought the packet, and achieve the effect of conserving bandwidth

Inactive Publication Date: 2009-07-09
SMART PATH CONNECTIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This approach conserves bandwidth, allows for more efficient allocation of network resources, and ensures timely delivery of synchronous data while tolerating delays in non-synchronous data services, reducing the required bandwidth allocation while maintaining circuit emulation services.

Problems solved by technology

Most of the time, this bandwidth is underutilized.
The containers that are assigned to carry the user packet data are therefore filled up with idle bytes, which consume network bandwidth without carrying any useful information.
When layer 2 packets, such as Ethernet frames or ATM cells, are sent through a MPLS tunnel, however, the standard layer 2 media access control (MAC) header that brought the packet to the ingress node does not contain all the information that the egress node requires for delivering the packet to its destination.

Method used

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  • Efficient transport of tdm services over packet networks
  • Efficient transport of tdm services over packet networks
  • Efficient transport of tdm services over packet networks

Examples

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Embodiment Construction

[0083]FIG. 1 is a block diagram that schematically illustrates a system 20 for integrated data transport over a packet network 28, in accordance with an embodiment of the present invention. An ingress integrated transport device (ITD) 22 receives data inputs from one or more sources, typically multiple sources. These sources include a TDM source 30 and a packet source 32, for the purposes of the present example. The ingress ITD encapsulates the data from sources 30 and 32 into packets, and transmits the packets over network 28 to an egress ITD 24. In the embodiments described below, the packets are transmitted through network 28 via MPLS tunnels, as described in the Background of the Invention. The data packets may therefore be encapsulated in accordance with the scheme specified by Martini et al., in the above-mentioned Internet draft. Alternatively, the packets generated by ITD 22 may be transmitted through tunnels of other types, as are known in the art, or by conventional IP rou...

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Abstract

A method for data communications includes receiving a time-division-multiplexed (TDM) input signal carrying a payload comprising data and determining whether the data comprise synchronous or non-synchronous data. A first encapsulation scheme is selected if the data comprise synchronous data, and a second encapsulation scheme is selected if the data comprise non-synchronous data. The data are encapsulated for transmission over a packet-switched network in accordance with the selected encapsulation scheme.

Description

FIELD OF THE INVENTION[0001]The present invention relates generally to communication networks, and specifically to providing circuit emulation services over packet networks.BACKGROUND OF THE INVENTION[0002]The Synchronous Optical Network (SONET) is a group of standards that define a hierarchical set of transmission rates and transmission formats for carrying high-speed, time-domain-multiplexed (TDM) digital signals. SONET lines commonly serve as trunks for carrying traffic between circuits of the plesiochronous digital hierarchy (PDH) used in circuit-switched communication networks. SONET standards of relevance to the present patent application are described, for example, in Synchronous Optical Network (SONET) Transport Systems: Common Generic Criteria (Telcordia Technologies, Piscataway, N.J., publication GR-253-CORE, September, 2000), which is incorporated herein by reference. While the SONET standards have been adopted in North America, a parallel set of standards, known as Synch...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04L12/56H04J14/08H04J3/06
CPCH04L12/4633H04J3/1617
Inventor HAREL, RAFIZELIG, DAVIDBRUCKMAN, LEONKAPPEL, NITZAN
Owner SMART PATH CONNECTIONS LLC